Recently, I became aware of a professor at one of the local colleges whose goal is to convince his students that you can have a system of ethics without a belief in God. Now I agree with him that holding his position is theoretically possible, but I said to him that such an ethical system is one built on sand. It would not stand the test of time nor the waves of adversity.
The U.S.S.R. tried to build an empire on godless atheism, and it failed miserably. Today in Russia we still see the results of the ethics of atheism. You would think that the Russians, having suffered so much under a totalitarian regime, would strive to do the right thing in appreciation for their new freedoms. Many have, but Russia today is torn apart by crime, greed, lawlessness, and immorality. Why? Was it merely too much freedom too soon, or are they still reaping the rewards of the ethics of atheism?
Many people today believe that God is, at best, unnecessary, and at worst, an intolerant task master. They say they don't need God to live right, and they can set their own rules for life. We live in a world obsessed with personal values. What people do depends on their personal values, but since everyone's values are different, there seems to be no standard by which we must all live. The very idea of basing our morality upon our values means that we have bought into the idea of a system of relativistic ethics. Personal values have replaced values of virtue as the foundation for ethical thought. Virtues speak of some objective realities, but personal values speak only about subjective decisions of our will.
Basing ethical decisions on personal values is problematic. For example, is something good because we love it, or do we love it because it is good? German philosopher Friedrich Nietzsche would tell us that something is good because we love it. According to Nietzsche, man himself is the universal and absolute reference point for all of life. "God is dead," he declared, believing this release from the demands of any metaphysical reality was an opportunity to develop his own system of ethics based on self cultivation.
Today the world is continuing to build an ethical system based on tolerance and enlightenment apart from God. Men have tried many ways to teach this new godless form of morality. A decade ago we constantly heard the term, "values clarification." It was a national effort to allow even children to set their own standards of behavior. It was a disaster as it justified almost any kind of behavior. Educators may not loosely throw around the term, "values clarification," as they once did, but many still try to teach a system of ethics based on man's own values. These are values which are rooted in the idea of desirable goods, i.e., that which we decide is important to us.
The use of the term "values" can have objective content, but we must evaluate the source of that "objective content," and that leads us back to the question at hand: Is it possible to have true morality without a belief in God?
In this essay I will address this question by presenting common arguments against the need for God and then I will respond to those arguments.
What Is Ethics Without God?
From the time of the Greeks, there have been many philosophers who have sought to prove that it is possible to have a universal morality without God. There have been many arguments presented to support this position, and in theory they may be right, depending on what one means by the word universal. They would say, all you have to have is a consensus on what is considered right and wrong behavior. Their position, with which I disagree, goes something like this:
First: If God is necessary for morality, then whatever God deems moral is moral. Therefore, why praise God for what He has done if He could have just as likely done the opposite, and it would have been equally moral. If whatever God says goes, then if God decreed that adultery was permissible, then adultery would be permissible. If things are neither right nor wrong independently of God's will, then God cannot choose one thing over another because it is right. Thus, if He does choose one over another, His choice must be arbitrary. But a being whose decisions are arbitrary is not worthy of worship.
Second: If goodness is a defining attribute of God, then God cannot be used to define goodness. If we do so, we are guilty of circular reasoning. That is, if we use goodness to define God, we can't also use God to define goodness.
Third: If one doesn't believe in God, being told that one must do as God commands will not help one solve any moral dilemmas.
Some philosophers, therefore, come to the following conclusion: the idea that a moral law requires a divine lawgiver is untenable.(1)
What should be our response as Christians? We should point out to people who side with the preceding position their lack of understanding concerning both God and the nature of man.
God is the creator and sustainer of all things. We would not even be self aware, let alone aware of right and wrong, if God had not created within us His image, and therefore the ability to make moral distinctions. The truth is we have no reference point for all this discussion about morality except as God reveals it. For us to argue with the source of morality is for the clay to argue with the potter.
Some philosophers say that for God to define what is right or wrong is arbitrary. God is not arbitrary; He is the source of all life and therefore the source of all truth. We have no basis to even understand the concept of being arbitrary except in reference to an unchanging God. That which would be circular reasoning or arbitrary in discussions about ourselves comes into perfect focus as we bring the dilemma close to the universal, absolute focal point for all creation, God Himself.
The second problem with these arguments is that they fail to recognize the nature of man. If man were not fallen, i.e., not corrupted by sin, we would have limitless potential to create from within ourselves a universal moral code. But, we are a fallen lot, every last one of us, and therefore incapable of fully knowing what is good (Rom. 3:23). We are even incapable of carrying out what we do know to be good (Rom. 7:18-21).
So the question of right or wrong has everything to do with the origin of our belief, not just the substance of it. No matter how sincerely I believe I am right about some moral decision, the true test is in the origin of that belief. And God is the only universal and absolute origin to all morality.
http://www.leaderu.com/orgs/probe/docs/god-ethi.html
FROM: Morality Apart From God: Is It Possible?
Ray Cotton
Ray Cotton is the former finance director and treasurer of Probe Ministries. He received a B.S. in business administration/management science from the University of Northern Colorado, a certificate in Christian studies from the Center for Advanced Biblical Studies, and an M.A. in interdisciplinary studies at the University of Texas at Dallas. He now serves in a ministry to international students.

"My religious belief teaches me to feel as safe in battle as in bed. God has fixed the time for my death. I do not concern myself about that, but to always be ready, no matter when it may overtake me." Maj. Gen. Thomas J. Jackson, 1862.

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Your position is so insightful and well thought out... kinda like ObamaCare...

"My religious belief teaches me to feel as safe in battle as in bed. God has fixed the time for my death. I do not concern myself about that, but to always be ready, no matter when it may overtake me." Maj. Gen. Thomas J. Jackson, 1862.